Black screen after bios update..

Hello,

I have an Aurora R4, i decided to buy a new graphic card but when i mounted it, it didn't work due to old bios version.

So i tried to update my bios version, I had an A03 and wanted to go to A11 but i read i had to go through all the versions.

So I started with version A05, I installed it in windows and said it was successfull and it had to reboot.

Computer reeboted then it turned on with a black screen, no alienware log no nothing and the fan was spinning like crazy..

I found on dell help to try unplug power and hold power button for 30 seconds, so I did that.

The fans stopped spinning hard but I still have a black screen.

What Can I do?

Thank you.